Well, good indications from you Misha... The single lens that I use to love was a 105mm, but I really don't remember its characteristics [I do remember that I used it along with a german "Rollei" camera - around 30-40 years old]... I don't like zoom lens, 'cause I've seen some differences in sharpness between zoom & normal lens; it is indeed very difficult to carry a lot of lens with you (and, obviously expensive to buy) when you could use some zoom lens for many different reasons!